code: def b85encode(b, pad=False):
      """Encode bytes-like object b in base85 format and return a bytes object.
  
      If pad is true, the input is padded with b'\\0' so its length is a multiple of
      4 bytes before encoding.
      """
      global _b85chars, _b85chars2
      # Delay the initialization of tables to not waste memory
      # if the function is never called
      if _b85chars2 is None:
          _b85chars = [bytes((i,)) for i in _b85alphabet]
          _b85chars2 = [(a + b) for a in _b85chars for b in _b85chars]
      return _85encode(b, _b85chars, _b85chars2, pad)
  
imports: import re
  import struct
  import binascii
label_desc: Use image node_id 19 for calling a global function with example usage: b85encode(b, pad) and returns: _85encode